LSI Processor for Digital Signal Processing and Its Application to 4800 Bit/s Modem. - Kazuo Murano; Shigeyuki Unagami; Toshitaka Tsuda (IEEE Trans. Commun., 1978)

CMOS LSI DSP and its application to voice band signals. - Toshitaka Tsuda; Kazuo Murano; Shigeyuki Unagami; M. Shimada; H. Kikuchi; S. Sumi; Y. Miwa (ICASSP, 1983)

An adaptive transversal filter VLSI. - Noboru Kobayashi; Hirohisa Gambe; Koji Aoki; Masami Koshikawa; Shigeyuki Unagami; Toshi Ikezawa (ICASSP, 1986)

A high-efficiency speech coding algorithm based on ADPCM with multi-quantizer. - Tomohiko Taniguchi; Kohei Iseda; Shigeyuki Unagami; Syozi Tominaga (ICASSP, 1986)

Digital signal processing in a 16kbps APC-AB codec by fixed point digital signal processor (FDSP-3). - Yoshihiro Tomita; Shigeyuki Unagami; Tomohiko Taniguchi; Yasuhiko Tada; Masahiro Taka (ICASSP, 1986)

A 16 kbps ADPCM with multi-quantizer (ADPCM-MQ) codec and its implementation by digital signal processor. - Tomohiko Taniguchi; Shigeyuki Unagami; Kohei Iseda; Yukou Mochida; Syozi Tominaga (ICASSP, 1987)

An 8 kbps TC-MQ (time domain compression ADPCM-MQ) speech codec. - Fumio Amano; Kohei Iseda; Koji Okazaki; Shigeyuki Unagami (ICASSP, 1988)

DSP implementations of sophisticated speech codecs. - Masahiro Taka; Rikio Maruta; Shigeyuki Unagami (IEEE J. Sel. Areas Commun., 1988)

ADPCM with a multiquantizer for speech coding. - Tomohiko Taniguchi; Shigeyuki Unagami; Kohei Iseda; Shoji Tominaga (IEEE J. Sel. Areas Commun., 1988)

Multimode coding: application to CELP. - Tomohiko Taniguchi; Shigeyuki Unagami; Robert M. Gray (ICASSP, 1989)

8- and 16-kb/s APC-AB voice codec using a single chip DSP. - Kazumi Satoh; Hideaki Kurihara; Shigeyuki Unagami; Masanori Kajihara; Yoshihiro Tomita (EUROSPEECH, 1989)

Combined source and channel coding based on multimode coding. - Tomohiko Taniguchi; Fumio Amano; Shigeyuki Unagami (ICASSP, 1990)

Echo cancellation and applications. - Kazuo Murano; Shigeyuki Unagami; Fumio Amano (IEEE Commun. Mag., 1990)